Mill roll stand



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Allg. 13, 1946. C, BEHRENS 2,405,637

MILL ROLL STAND Filed June 7, 1943 Sheets-Sheet 2 v INVENTOR /Yef'ef Cefen/S aww-WM ATTORNEYS 5 Sheets-Sheet 5 MILL ROLL STAND H. C. BEHRENS Filed June 7, 1943 Aug. 13, 1946.

, lNveN-roR Ye/*bem* e/@fems ATTORN EYS JlllllllllllllilIl.|.llllil-II.lr`

ug. 13, 1946. H, Q BEHRENS 2,405,637

MILL ROLL STAND Filed June '7, 1943 5 Sheets-Sheet 4 ATTO RN EYS Aug. 13, 1946.

H. c. BEHRENs 2,405,637

MILLVROLL STAND Filed June 7, 1945 5 Sheets-Sheet 5 pls\\\\\\\\\w 7/////////////////////// INVENTOR ggfeff Cehl'erw ATTORNEYS Patented Aug. 13, 1946 MLL ROLL STAND Herbert C. Behrens, Haddon Heights, N. J., as-

sig-nor to Samuel M. Langston Co.,

a corporation of New Jersey Camden,

Application June 7, 1943, Serial No. 490,001

c1.`24z-5s) 1o iaims.

The present invention relates to roll stands of a type adapted for lifting heavy rolls of sheet material from a conveyor, carriage or other supporting means and supporting them in rotatable position so that the rolls may be unwound and a continuous running web supplied therefrom to any common type of mechanism for operating on the web, as for instance a corrugating, trim-v' ming, slitting, scoring or rewinding machine.

One'object of the present invention is to provide a roll stand having new and improved means for centering its roll supporting members with respect to the roll to be lifted and supported, and for moving the supported roll into desired operative position with respect to the web pulling mechanism.

Another object is to provide a roll stand designed to operativelymounttwo rolls in proximity to each other-and in such a manner as to eiect the utmost economy of space. One of these rolls may, for example, serve as a reserve roll while the other is being unwound.

According to the invention, parallel angularly movable roll supporting members or arms carry respective chuck spindles adapted to extend into and hold the ends of the tubular core of the roll to be raised. i

As a feature of the present invention, means are provided for simultaneously moving both roll supporting arms towards or away from each other to accommodate rolls of different widths.

As a further feature, means are provided for moving the pair of roll 'supporting arms laterally in unison in either direction substantially parallel to the roll axis to center accurately said arms with respect to the roll to be lifted and supported, and to center the supported roll in correct opera'- tive position with respect to the machine which operates on the delivered web.

As another feature, new and improved means ported in channelsJZ in said floor.

As a further feature, new and improved chuck spindles are provided at the ends of the roll sup- -porting arms for supportably engaging the ends ofthe roll.

Various other objects, features and advantages of the invention will be apparent from the following particular description, and from an inspection of the accompanying drawings, in which Fig. 1 is an end view of one form of roll stand embodying the present nventon, and shown in roll supporting position;

Fig. 2 is -a section taken approximately on line 2-2 of Fig. 1, one of the rolls being removed;

Fig. 3 is a section taken approximately along theline 3 3 ofFig.2;

Fig. 4 is an end view of another form of roll stand embodying the present invention, and shown in roll supporting position; l

Fig. 5` is a section taken approximately along the line 5'5 of Fig. 4, one of the rolls being omitted;`

Fig. 6 is a section taken along line 6 6 of Fig. 4; Fig.. 7 is a section taken, along line 'I-l oi Fig. 5;

Fig. '8 is a fragmentary horizontal section of l another form of roll stand embodying the present invention, and shown employing hydraulic motive power for operating the various adjustable elements; and

l Fig. 9 is an end view ofthe roll stand of Fig. 8, taken approximately along the line 9-9.

Referring to Figs. 1-3 of the drawings, the roll stand is fixed on a floor I0 between two roll transporting means shown as conveyor rollers Il sup- The rolls A and B to be lifted and supported by the roll stand o are moved along the conveyor rollers Il until are provided for adjusting one end of the supf ported roll transversely relative to the axis of the roll, to compensate for diierences in the diameters of the supported roll and thereby eliminate slackness on one side of the'web.

As a further feature, a two speed drive is provided for lifting and lowering the roll supporting arms, whereby the high speed drive may be used to raise or lower the arms without load and the low speed may be employed when raising orlow-v ering a heavy roll.

As another feature, the two roll supporting arms carry brakes for both ends of the supported roll to control the tension of the web being pulled from said roll.

they reach approximately the correct positions on opposite sides of said stand. The standis then operated to move its roll supporting memf bers into engagement with said rolls, and to elevate said members and the rolls into proper posiiton with respect to the corrugating, slitting, scoring, rewinding or other, similar machine which receives and operates on the web. 'I'he two rolls A and B may serve simultaneously as the running rolls of two of these operating machines on opposite sides vof the roll stand, but ordinarily only one of these rolls serves as a running roll` for a machine, while the other is held in reserve for delivery to said machine when the first roll has been used up.'

The roll stand comprises a pair of end frames I3 and I4 between the conveyors Il and spaced 3 to a distance greater than the maximum length of the rolls to be supported. Extending between these frames I3 and 'Il are two horizontally spaced rock shafts I disposed one above the other. One of the shafts I5 carries a pair of roll supporting arms,v I1l extending outwardly to the left of the roll stand as viewed in Fig. 1 to engage the roll A, and the other shaft l5 carries a pair of roll supporting arms I1 extending outwardly to the right of the roll stand to engage the roll B.

Each of the rock shafts I5 is supported at one end on the frame upright Il in a manner to permit limited endwise adjusting movement of said shaft, and for that purpose has1 an end yportion 25 of reduced diameter supported on bearing roll- -ers 28 journalled in said upright and provided with circularly grooved shaft engaging peripheries as shown particularly in Fig. 3. v The other end of each shaft I5 is supported by bearing rollers 21 which may be'similar to the bearing rollers 28, and which are journalled in a frame 28on the upv .right I3. The two frames 28 are superposed and are slldably adjustable in respective openings 38 in the upright I3 to tilt'either rockshaft I5 for the purpose to be made` apparent. I I 1 r The roll supportinglarms I 1 are splined to their corresponding shafts .I5 to cause angular movement of lsaid arms uponrotation `of saidshafts corresponding shafts for the purpose to be made apparent. For rotating Veach of the shafts I5,

ysaid gear train to raise angularly the corresponding roll supporting arms I1 in an elevated position in which they will not interfere with the movement of the rolls A and B alongsideof the rol1 stand. These rolls A and B are then pushed over their respective conveyors until they lie midway between the corresponding. arms I1. Each ofthe hand wheels is then turned in a direction to lower the corresponding pair of arms I1 at ,comparatively high speed to av position in which they flank the ends of thehollow center cores 51' of the corresponding paper roll. The two arms I1 are then moved towards each other into supporting engagement with the roll core 51' in a manner to be described, the clutch lever 52 reversed so that the worm wheel 42 of the low speed drive is coupled to the shaft I5, and the hand wheel 35 rotated to angularly elevate the loaded arms I1 x at a slow speed but with high-mechanical advantage, and therebyraise -thepaper roll to the desir'ed elevated operative positionzwith respect toA Y .and .to `permit movement of said-arms along their there isv provided a two-speed gear train which is shown manually-` operated from a hand wheel 35 fixed to a shaft 38 journalled in a corresponding f frame 28, but which, if desired, can be operated from a motor in place of said hand wheel. The

slow Speed drive t0. each shaft I5 desirably com.

prises a worm 31 onthe hand wheel shaft `38 housed inthe corresponding frame 28 and meshing with a worink wheel 38 journalledin said the paper pulling machine.

lFor supportably engaging the paper rolls, each of the arms I1 desirably lcarries 'at itsouter end Aa roller bearing 80 in which isl journalled a..` spinduced diameter for'insertionv into the' roll core` 51", and having a series of slots in whiohare pivotallyconnected respective cleats 85. V`'The exframe. 'Ihis worin ywheel'38 is on a shaft carrying a worm 4 I meshing with a worm'wheel lI2 which l is housed in the` frame 28 and which embraces' the corresponding shaft I5 witha .rotative ilt. This worm wheel 42 can be disengageablyicoupledfto the shaft I5,in a manner to be described.

The high speed transmission between the hand wheel 35 and the shaft I5 desirably comprises a spur pinion gearSII on the hand wheel shaft 38 driving through an intermediate gear I9 a spur gear 5| housed in thefrarne 28 and embracing the shaft I5 with a rotative fit.`

For coupling the shaft I5 selectively to either c the slow or high speed drive, the end of the shaft I5 is hollowed to receive a clutch lever -52 pivoted at its inner end 53 to said shaft, and formed with a handle 5l at its other end projecting outwardly beyond said shaft to render said-"handle easily accessible for manipulation. A dog 55 pivotally connected to lever 52extends through an opening in theI shaft I5 and is adapted to be moved by angular vmovement of` the lever 52 into or out of coupling drive engagement with the gear I2. A dog 58 pivotally connected to the lever 52 extends through an opening inthe shaft I5 and is movable into or out of coupling engagement with the gear 5I. rll'he dogs 55 and 58 are diametrlcally arranged on the clutch lever 52 so that when one of said dogs is in gear coupling engagement, the other is out of gear coupling engagement. A latch 58 hinged at 51 to the frame plate 58 locks the clutch lever 52 in either one of its two operative positions, and is movable about its hinge connection to permit the angular movement 0f said clutch lever.

tent ofinward axial movement of the. spindles 8| 'with respect tothe paperjroll A is limited by 6,8V onthe Spindle p '.8Iwith theendofthe roll. f 'A Toeirpand the cleats 85 into rm drive engage;` `ment with the roll core walls, vthere is' provided a shaft 61 threaded in they spindle 8l, and hav'- A the engagement of a shouldery ing a rotary handle 88 at its outer endrand a cam cone 1o near its inner end. As the handle 88 is turned, the cam cone 10 is moved axially to thrust .the cleats 85 radially outwardly into driving engagement -with the roll core wall.

' For moving the opposed arms I1 of each cooperating pair towards or away` from each other, there is provided a screw 15 which is supported in suitable bearings 18 attached to the. corresponding shaft I5 for revolution therewith, and

1 which extends along one side of said shaft substantially parallel thereto.

This screw 15 has left andright hand thread engagement with the two opposed arms I1 .so that as this screw is turned, these arms are moved towards or away from eachV other according to the direction of rotation of said screw. 1

For rotating the screws 15, there is provided a motor supported on the frame upright I4, a pinion 8| on the motor shaft, and a gear transmission between said pinion and each of the screws 15. The upper transmission comprises a spur gear 82 meshing with the pinion 8l and driving a spur gear 83 through an intermediate pinion 84 journalled on the same center as shaft I5. The gear A83 has its shaft connected to the screw`15 through a universal coupling 85 shown in the form of a knuckle joint to permit tilting of the screw 15 with its associated shaft I5 for amasar the purpose to be made apparent. 'Ihe lower transmission is similar to the upper transmission except that an intermediate gear 88 is provided between the lower gears 82 and 88 driving the lower screw 15 through lower gear 88.

The screw 15 revolves about the axis of its associated shaft I when this shaft is rotated. To maintain drive connection to the screw 15 irrespective of itsl angular position with respect to the axis of the shaft, the spur gear 88 is journalled in a bearing 88 fastened to shaft |5 to give said bearing the same angular movement'.

Each gear 82 is splined to its corresponding shaft 18 journalled in the frame upright Il, so that said gear is shiftable along said shaft. A throwout yoke 81 engages a collar or other 'element rigid with the gear 82 and is operated from a handle not shown to shift said gear ln or out oi' mesh with the pinion 85 while maintaining mesh engagement with the drive gear 8|. By means of this arrangement, either screw 15 or both screws 15 simultaneously may beoperated to bring the corresponding pair of arms I1 in centered position with respect to their associated paper roll.

After arms I1 of each pair have been angularly moved into position so that their roll supporting spindles 8| are centered with respect to the corresponding roll cores 51', the motor 80 is energized to rotate the screw 15 and move said arms I1 towards each other. As these arms I1 are drawn towards each othery their chucks 82 move into the interior of the roll core 51' and come to rest when the spindle shoulders 88 engage the outer ends of the roll. The hand wheels 88 are then turned manually to cause the cams tol thrust the cleats 85 outwardly against the inside wall of the roll core 51', causing some indentation and preventing the paper roll from rotating about the chucks.

After the chucks 82 have been properly inserted in the core of the corresponding paper roll, the clutch lever 52 is shifted to couple the gear 42 to the shaft I5. The hand wheel 85 is then rotated to elevate the arms I1 through the low speed drive and suspend the roll in position for unwinding operations.

To square the roll in position to prevent slackness on one side of the web due, for instance, to differences in the diameter of the roll at its ends, each of the slide frames 28 is moved in the upright I3 by means of a screw 80 journalled in said upright and formed at its ends to receive a suitable turning tool. 'I'his screw 90 is threaded in the slide frame 28 and is held against axial movement, so that upon rotation thereof, said frame is adjustably moved in its respective frame opening 80 and the shaft I5 correspondingly tilted.

To move the arms I1 of each cooperating pair laterally in .unison in the same direction for accurate centering of said arms with respect to the roll to be lifted, or accurate centering of the supported roll with respect to the paper pulling machine, each of the slide frames 28 has rotatably connected to one end thereof a hand wheel 9| having a radially inward flange connection to its respective shaft I5 and a threaded connection to the slide frame 28, whereby upon rotation of said hand wheel 9|, the shaft I5 is moved axially a limited distance and the arms- I1 carried by said shaft correspondingly moved.

Each of the arms I1 carries abrake device for controlling the tension on the web of the running roll. Each of these brake devices comprises a brake wheel or sleeve 95 keyed to the outer pivotally interconnected at |02 and |08. The

fourth link |0| has a slot and pin connection at one end with the link es and is blfurcated at its other end to receive the link |00. This link |00 has threaded thereon a hand wheel |04 which -bears against the bifurcated end of the link I0| to providev initialr brake tension and which maybe loosened to allow link |00 tomove outwardly so as to be disengaged from the link thereby rendering the brake inoperative.

The brake pressure of the shoes 98 and 81 on the brake sheave 95 may be controlled manually by the manipulation of the hand wheel |58 as described, or automatically by a web tensioning device, which maycomprise a spring-pressed tension roller |05 and a pair of spring loaded idler rollers |08 and |01, the paper from the roll being threaded over and around these rollers |05, |08 and |01 as shown. The tension roller |05 is pivotally supported through brackets' |08] and a rock shaft ||0 on the frame of the roll stand to allow said tension roller |05 to move up or down according to the tension of the paper passing over it. Between the rock shaft ||0 and' the lbrake device is a linkage comprising links III, |I2 and ||3. The link |I3 carries at one end a cam IM extending in a slot I|5 at one end of the brake link |0|. -As the tension roller |05 moves lup or down'according to the tension of the running paper thereon. this movement is transmitted to the cam H4. Thefresulting rotation of this cam ||4 causes the links 88 and |0I to move towards or away from each other and thereby causes the brake shoes 86 and 81 to move in and out with respect to the brake sheave 95. Therefore, when the running paper from the roll slack is suilicient to cause dropping of the tension roller |05, the brake shoes 88 and |91 are automatically moved inwardly towards the brake sheave 95 to increase the brake pressure, and vice versa.

In the form of the invention shown in Figs. 4 to 7, the rolls A and B are adapted to be transported to centered position with respect to the roll stand by means of a dolly system comprising a roll supporting carriage |20 movable along main tracks |2| until in position opposite the roll stand. In this position, the carriage |20 will move on to a truck |22 movable along tracks |23 extending transversely of and below the main tracks I 2|. By means of this transportation system, the rolls A and B can be moved towards or away from the roll stand transverselyof the roll axes after they have reached a center position with respect thereto.

In the form of the invention shown in Figs. 4 to '7, the two arm carrying shafts |5a are supported at one end in the frame upright Ila and at the other end in slide frames 28a which are guided in respective openings 30a in the' frame upright |3a, and which are adjusted therein through adjusting screws 90a to square the supported rolls. The two slide frames 28a are alongside of each other, so that the shafts |5a are at the same level. Each of these shafts |5a is rotated through a single speed from a hand wheel 35a or a motor substituted yin'place of said hand wheel. The drive transmission between f 1 1 each hand wheel 85a to its corresponding shaft Ila. comprises a worm III on the spindleof the hand wheel 35a meshing with a worm wheel |26 on a shaft |11 which also carries a worm |25 meshing with a worm wheel |36 keyed to the corresponding Aslnilift lia. .A suitable vlatch may be provided for `locking the shafts |a`to theI frame uprights Ila and V|44: when these shafts have been rotated in proper podtion.

The hand wheels Il as in thefconstruction of, Figs. 1to3, servetoadjusttheshafts'llaaxially to'move the arms IIa in unison/in proper position with respect to the rolls or B.

Each of the shafts |5a has/a groove |35 extending lengthwise thereof receive 'the screw a axially of said shaft. This screw 15a is supthere is provided on one oi' the frame uprights I 3b ported in the shaft groove |in suitable beary ings 'I la mounted in said groove. with the screw 15a axially supported in its corresponding shaft Ila, no special provisions need be made to main.- tain a drive connection to said screw as said shaftisrotated. The arms -Ia embrace the outside 0f their corresponding shaft |5a, and have respective proiections |36 which extend snugly into corre.- sponding shaft grooves |35 and which are threaded on ycorresponding screws 15a. Each pair of cooperating arms Ila has a right and left hand threaded connection with a screw 15a, so that said arms-are keyed to said shaft for rotation therewith, and slide therealong-in opposite directions upon rotation of said screw.

The screws 15a are driven from the motor Ila by a drive gear Sla on the motor shaft and a transmission from said drive gear to each of said screws. Each of these transmiions includes a gear 82a meshing with the drive gear lla, and with a driven gear 63a mounted on a shaft having a universal connection 65a to the screw 15a.

Either one of the screws 15a may be disconnected from the motor drive by means comprising a throw-out yoke 61a lengaging a collar or other element rigid with the gear 82a, and having a rotatable connection with one end of a shaft |4| journalled in the frame upright |4a. The other end of this shaft |4| is threaded in the frame upright |3a and is secured to a hand wheel |42, so that upon rotation of said handwheel, the shaft |4| is moved axially to shift the gear 62a into or out of mesh with the driven gear 63a 4while maintaining drive connection between the gears Ila and 62a. 4

The form of web tensioning device which is indicated in Figs. 4 and 5', comprises a spring loaded tension roller journalled in slidable bearing blocks |46, each of which has a rack |41 driving an electric torque motor |48 through an intermediatepinion |56. This torque motor |46 in turn engages a pinion on a shaft |5|,' the rotational movement of which is transmitted to the link 96a of the brake device by links |52 and |53. The motor |46 is always energized, andas the tension roller |45 moves under the action of the spring and the tension of the paper, this roller movement stops the motor |46 or allows motor |46 to rotate, which in turn tightens or loosens the brake on the 'paper roll.

The brake device comprises Athe four links 66a, 99a, inta and |6|a arranged in the form of a rectangle around the brake sheave 55. The two links 66a and Illa have pin and slot connections with the link 96a, and said link 56a is pivcted at |54 to the corresponding arm Ila. As the link Sla is moved angularly about the pivot |54 in a hydraulic cylinder |66 having suitable inlet and outlet for the actuating fluid, and having a piston 6| connected to a rack |62 meshing with a gear |63 keyed 'to the end of the 'shaft |5b. By controlling the admission and discharge of the actuating uid from the cylinder |60, the shaft t|151; may be made torotate intoany suitable posi- By means of a hydraulic cylinder |65 iixed in the groove |35 of the shaft |5b, and by providing dual piston connections to the two arms Hb, these arms can be moved inunison towards or Y away from each other.

For moving the shaft axially to move the two arms Hb in unison in thesame direction, a hydraulic cylinder |66 may be provided with a piston connection to the axial portion of said cylinder. This hydraulic cylinder |66, for instance,

may be supported by brackets |61 to the frame upright Hb. f

The chuckspindles 6|b can also be hydra licallyv controlled by providing each of said spindles with a. hydraulic cylinder |16 having a piston connection to the cleat expanding shaft 61h. The chuck itself instead of having three expansible cleats as shown in the constructions of Figs.

85 1 to 5, may have merely one expansible cleat 65 and .a series of fixed radially outwardly projecting bosses 1|.

The different hydraulic units can be controlled from a single station to eilect the necessary roll 40 stand operations. In all other respects, the roll stand of Figs. 8 and 9 may be similar to that of Figs. 1 to 7.

As many changes can be made in the above apparatus, and many apparently widely different embodiments of this invention can be made without departing from the scope of the claims, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

What is claimed is:

1. A roll stand having a shaft, a pair of arms keyed thereto for rotatably supporting a roll of sheet material therebetween, a drive member, a low speed transmission for connecting said drive member to said shaft for rotating the latter and lift the roll, a high speed transmission for connecting saidv drive member and .said shaft for rotating the latter and lower said roll, means for moving said arms in a direction parallel to the axis of said shaft, means for moving one end of said shaft laterally in respect to the other end to tilt the axis of said roll, and means controlled by the tension of the sheet withdrawn from said roll for varying the resistance to the rotation of said roll.

2. A roll stand including a shaft, a pair of opposed roll supporting members keyed thereto, a pair of gears on said shaft, a drive member, a high speed transmission between said drive member and one of said gears for rotating said shaft in one direction, a low speed transmission between said drive member and said gear for rotating said shaft in the opposite direction, and

response to the movement of the -tension roller means for alternately connecting one of said gears to the shaft and disconnecting the other r wheel, a transmission between said hand wheel and said worm gear, a transmission between said hand wheel and said spur gear, and means withinsaid shaft for locking either the spur gear or the worm gear to said shaft.

4. A roll stand including a shaft having a pair of roll supporting arms keyed thereto and movable in vertical planes, a threaded rod coaxial with said shaft and having righthand and` lefthand threaded portions engaging said arms respectively, a motor having a stationary base, and gearing connections between said motor and said rod.

5. A roll stand including a substantially horizntal shaft having a. pair of roll supporting arms keyed thereto and movable in vertical planes, a threaded rod coaxial with said shaft and having righthand and lefthand threads engaging portions of the two arms carried by said shaft, a motor having a stationary base, gearing connectionsbetween said motor and said rod, and means for interrupting the transmission of power from said motor to said rod.

6. A roll stand including a shaft having a pair of roll supporting arms, separate bearing members for the opposite ends of said shaft, means associated with one of said bearing members for o rotating said shaft to raise or lower the roll, and means associated with one of said bearing members for bodily'moving the corresponding end of said shaft and thereby changing the angle of the axis ofthe'roll. A

'7. A roll stand including a shaft having a pair of radially extending roll supporting arms, a bearing member for one end of said shaft, and means for moving said member laterally to thereby tilt the axis of the roll;

8. A roll stand including a shaft having a pair of radially extending roll supporting arms, a bearing member for one end of said shaft, means for moving said member laterally to thereby tilt the axis of the roll, and means associated with said bearing member for rotating said shaft to raise or lower the roll.

9. A roll Vstand including a shaft, a pair of roll supporting members keyed on said shaft and said shaft to tilt'the axis extending radiallytherefrom, means for rotating said shaft to raise andlower the roll carrying portions of said members, and means for tilting of the supported roll. 10. A roll stand including a shaft, arms keyed thereto and having roll supporting elements, means for moving said arms along said shaft and toward and from each other, means for rotating said shaft to move the arms in vertical planes, and means for moving one end off'said shaft laterally in respect to the other end to tilt the axis of the supported roll;

' HERBERT C. BEHRENS. 

